Pump.



G.- W. KELLOGG.

PUMP.

APPLICATION `FILED FEB. I2, 1914.

Patented May 2, 1916.

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7111.5 @Hof/11W efEoneE w. Entweder EiicH'EsrEn., NEW Yoan, .assioma rooee irre. co., or acciai-sana, NEW Yoan, a comentarios' or NEW Yo appueaaoaaiei'rebmay 12,1914. i-sensinaeiaiaa 1 i. 1911 ,318i A Specicativers'atent.

To all 'whom t may` concern.' 1

Be it known-that I, GEORGE of Rochester, inthe county of Monroe and State of New York, have invented certain new and useful- Improvements in Pumps; and I do hereby declare the followingtobe a full, lclear, and exact descriptionof the saine, reference being had to the accompany- -ing drawings, and to the referencenumerals marked thereon. l

My present invention has for its object to provide a pump adapted particularly to be used for con'ipressing` air or other gases in which the arts are so arranged that excessive heating of the piston is obviated and Y the parts are kept thoroughly lubricated without the liability .of the oil, o r .other lubricating substance, being carried into the Y pressure line of pipe.

To these and other ends theinvention consists in certain Iimprovements and combinations of parts, all as will be hereinafter more fully described, the novel features being pointed out in the claims at the end of the specification.

, In the'drawings: Figure 1 is aside elevation of a pump constructed in accordance with my invention; Fig. 2 is a vertical sectional view thereof; Fig. 3 is a horizontal sectional view taken on the line 3"---3x ofv Fig. 2, and Fig. LLisa detail view showing in section the up er end of the pum cylmder, the inclose piston and the cy inder head coperating therewith. i

`the several figures indicate the saine parts.

imilar reference numerals throughout The pum illustrated as showing one embodiment o my 4invention comprises a shell or c linder having a mainor body portion 1, o given diameter, and the end portion 2 of greater diameter interiorly to form an annular chamber 3 which is open .to the atl mosphere through a plurality. of apertures '4 circumferentially disposed in the wall of the cylinder and preferably located at the point of juncture betweenV said body 1 and enlargedend 2. The cylinder walls are further provided with a plurality of conduits or channels, two of which areshown in the present instance, indicated by 5, which W. Kimono heated.

' Patented may e, reis.

vserve to connect the 'two-ends ofthe. cyl. i

inder and form conduits through 'which any excess of lubricating oil which may accu-V multe 'in the bottom of the -chamber 3, by reason of the reciprocation of the piston,

4may, easily return to the bottom of the cylbolts 7 and between these naled in suitable bearings is the crank inder.l The latter is closed at itsv lower end by a .crank case 6 secured in positionby thepgarts and jourshaft 9, connected by thepitman 10 to the -journal pin 11 of the piston 12. The piston 12 is provided on its outer end with an anso designed that w e the piston 12 recipro cates in and 1s guided by the body 1 ofthe nular .ri m.13, the arts of the pump being i I cylinder, the upper edge of its rim 13, pro- Jects above the end of said body and reciprothe upper end of the cylinder and the designingof the .parts so thatthe upper edge of the rim of the piston is not retracted into the body 1 ofthe cylinder as the lubricating oil is thus prevented from working its way upward upon the exterior surface of the piston and into the recess within the latter.

'I he cylinder` head 14 is located within the cylinder and is supported on `the inwardly pro]ecting tubular post 14a depending centrally from the flange or cap 15, which is seated in an annular notch 16, formed in the edge of the enlarged portion 2 of the cylinder and in which it is securely locked by the ange" 17 of. a screw-threaded ring V1'8. J As shown, the headI 14 coperates with the innen surface ofthe flange 13 of the piston and is provided withone or more packing rings 19. It should 0also be stated that the supporting of the cylinder head centrally,`

as shown in Fig. 2, permits the innersurface o f the rim of the piston to be exposed to the cooling influence of the air in the cylinder chamber 3, thus assisting in preventing the Vpai-ts tfrom becoming over- '15 the port 14 containing the spring 2S which wardly extending head disposed in spaced -Inlet and outlet valves are provided for Controlling the-admission of air or Agas into y a spring 23 which rests upon and also serves as a means of holding in place a gauze screen 24. The outlet valve comprises a ball 25 resting upon a seat 26 at the bottom of is held in place by a screw cap 29 Vfrom which leads the pressure conduit pipe, indicated by 30. I

A pump constructed in accordance with my invention is capable of use for a variety of purposes and is particularly adapted to be used as an air-pump arranged to be driven by the engine of an automobile :for supplying air under pressure for any purpose for which it may be desired. The construction ol' the parts of the pump permit it to be driven at high speed and to compress air under high pressures without becoming heated. The arrangement of the cylinder head within the recessed piston and the provision for lubricating the latter .exteriorly and preventing the lubricating sub-` stance from werking its way Ainto the compression chamber o'aviates the inconveniences and disadvantages occasioned by the pres'- ence of oil in the pressure lira anc", which becomes a sefiols menace if the ell 'used is of a minera?. base and any considerable quantity is forced into the tires of an cutomobile. v

I claim as my invention:

1. In a pump, the combination with a cvfinder having a body portion of given dial?`r eter and an end portion o1c greater diameter, apertures formed through the wall of the cylinder for admitting air thereto, an inrela-tion to the side and end Walls o-the cylinder, the outer face of the head being directly exposed to air admitted to the cylinder through said apertures,` a piston guided in the body of the cylinder and having an annular rim movable in the larger portion of the cylinder in, spaced relation towthe Walls thereof, said rim being in engagement with the aforementioned head, the outer surface of the rim being directly exposed to the air admitted through said apertures, and inletl and outlet valves arranged on the head. 2. In a pump, the combination with a cylinder having a body portion of given diameter and an end portion of greater diameter,

apertures formed through the wall of theA cylinder for admitting air thereto, an inwardly extending head mounted on the cylinder disposed in spaced relation to the side and end Walls thereof, the outer face of the inwardly extending head being directly ex-` posed to air admitted to the cylinder through Said apertures, a piston guided in the body of the cylinder and having an annular rim movable in the larger portion of the cylinder in -spaced relation to the walls thereof, said rim. being in engagement with the aforementioned inwardly extending head, the inner and outer surfaces of the rim being directly exposed to air ad- -mitted throughsaid apertures, and inlet'and outlet valves arrangedonthe head.

3. In a pump, the combination with a cylinder having an enlarged upper end provided with apertures for admitting air thereto and a crank case -at its lower end, channels connecting its enlarged upper end with the crank case, an inwardly extending head mounted on the cylinder disposed in spaced relation to the side and end walls thereof, the outer face of the inwardly extending head being directly exposed to air admitted to the cylinder through said apertures, a piston guided in the body 'of the cylinder and having an annular rim movable in the. larger portion of the cylinder in spaced relation to the walls thereof, said rim surrounding the aforementioned inwardly extending head,'the inner and outer surfaces of the rim being exposed to air admitted through said apertures, and inlet and lower end, said cylinder having channelsl connecting its enlarged upper end with the crank case, of a piston guided lin the cylindef'having yan end rim projecting into said enlargement of the cylinder and a head on the latter projecting into the cylinder and a packing ring on the head ccperating with the inner wall of the rim of the piston and inlet and outlet valves carried on said head.

5. In a pump, the combination with a cylinder having a body of given diameter and an end portion of greater diameter which is open to the atmosphere, of a piston guided in the body ofthe cylinder and having a rim moving into and out of the enlarged end of the cylinder, a cylinder head engaging within the rim of the piston and .a post supporting itfoffless diameter than the head and having means for attachment engaging the cylinder.

6. In a pump, the combination with a cylinder having a body of given diameter and an end portion of greater diameter which is open to the atmosphere, of a piston guided in the body pf the cylinder and having a valve in l'Said head and an loutlet valve 1orlrn moving into and out of the enlarged cated in the perforation of said post.

end of the cylinder a cap secured to the end of the cylinder having a central tubular GEORGE W' KELLOGG y post extending into the cylinder, a head Witnesses:

carried by the post and coperating with G. WILLARD RICH, the inner surface of the plston rim, an inlet C. F. WRAY, 

